How do you show roi to advertisers ?

Twitter如何向广告主证明投资收益率？

It 's difficult to develop a sound business case for them because the roi often can be nebulous . "

很难找出一个可靠的商业案例，因为它的投资回报率通常都非常模糊。”

You have to take it on faith , " says jack j. phillips , roi 's chairman .

你需要无条件地相信它。”

Call it a long-term investment , and one with incalculable roi .

可以把它称为回报无限大的长期投资。

Organizational contributors give for the same roi .

公司投资商同样为这种巨额回报率而投资。